The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2009
Filed:
May. 12, 2006
Djamel Charmat, South Bend, IN (US);
Djamel Charmat, South Bend, IN (US);
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An actuator for a drum brake including a plunger connected through a resilient member to a linkage attached to a web on a brake shoe. A rod extends from the plunger and engages a lever arm that is pivotally retained on the web. The lever engages an extendable strut of an adjuster arrangement through which a running clearance is maintained between the brake shoe and a drum. During a brake application, pressurization fluid acts on the plunger to develop an operational force that is communicated through the resilient member to move the brake shoe into engagement with a drum. Should the operational force overcome the resilient member, the plunger moves toward the linkage and a reactive force is applied through the rod that acts through the lever arm to prevent a pawl from rotating such that a current length of the strut and correspondingly a current running clearance is sustained.